1. Check the "dark current". If you don't know how, have someone do it for
you who knows how to use an ammeter. Info is probably on miata.net
someplace.
2. I don't understand the insulation crack. If that positive battery cable
comes in contact with ground, the resulting effect will not be at all
subtle.

One other thought. After six or so years the original Panasonic battery died
in my '90. I bought another and, after a week, it died. A replacement
battery worked for many, many years. Root cause of that one wasn't dark
current; it was a bad battery.

Ken


"USAROVER" > wrote in message
...
> Has anyone experienced a battery drain even after disabling the radio
> (aftermarket)? My '91 has an issue with holding voltage. A new battery
was
> installed this summer after some alt and bat testing. The alt tests good,
> but even the new bat won't hold voltage for more than two days. Am I
> looking at a crack in the insulation of my positive bat cable? That has
> bitten me on another vehicle in the past!
>
> The grounds have been checked and cleaned per miata.net posts. All
> accessories with the exception of the ECU have been disabled. No lights
are
> left on, etc. Ideas, inspiration>
>
> Thanks
>
>
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